Do Essential Oils Really Have Medicinal Properties?
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small 😎
❝Do essential oils really have scientific merit?❞
Great question! Assuming you mean “…for medicinal purposes” then it really depends on the oil in question.
For example, one can probably buy a big book of essential oils from a New Age store, and a lot of claims for different oils will not have any scientific backing whatsoever.
However! Some definitely do. For example, we wrote a little while back about ginger:
Ginger Does A Lot More Than You Think
Now, the active compound that gives ginger those properties and more is gingerol. Which is usually found as pure ginger oil, in other words, ginger essential oil.
Another essential oil that definitely does have benefits is that of Boswellia serrata, commonly known as frankincense. It can be used in various forms, and the essential oil is one of them; see:
- Five Supplements That Actually Work Vs Arthritis
- When Painkillers Aren’t Helping, These Things Might: Science-Based Alternative Pain Relief
Meanwhile, menthol, the essential oil of peppermint, has its pros and cons:
Peppermint For Digestion & Against Nausea: How Useful Is Peppermint, Really?
And lavender essential oil does really have a sedative effect:
Herbs for Evidence-Based Health & Healing
If you have a different, particular essential oil in mind, let us know, and we can do a deep-dive on it for one of our “Research Review” editions!
A note on safety
Essential oils are pure and undiluted extracts of what’s usually a particularly potent chemical from a plant. Two things to bear in mind about this:
- Just because a chemical is potent, does not mean it will necessarily help you in a specific way, or indeed at all. On the contrary, many potent chemicals are simply harmful. So, be careful.
- Essential oils being so strong means that usually only a drop or two is required for effects; consult available literature (or ask us to do that for you!), and employ good safety practices such as:
- Do not use undiluted essential oils on your skin or internally
- If you are going to use it internally (diluted, following instructions from a reputable source, and with your doctor’s blessing, please) then test it on your skin first at the same dilution, in case of any adverse reaction.
- However you are using it, if you have any kind of adverse reaction, stop, and seek medical attention if it’s severe and/or it persists.
Take care!
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Genetic Risk Factors For Long COVID
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Some people, after getting COVID, go on to have Long COVID. There are various contributing factors to this, including:
- Lifestyle factors that impact general disease-proneness
- Immune-specific factors such as being immunocompromised already
- Genetic factors
We looked at some modifiable factors to improve one’s disease-resistance, yesterday:
And we’ve taken a more big-picture look previously:
Beyond Supplements: The Real Immune-Boosters!
Along with some more systemic issues:
Why Some People Get Sick More (And How To Not Be One Of Them)
But, for when the “don’t get COVID” ship has sailed, one of the big remaining deciding factors with regard to whether one gets Long COVID or not, is genetic
The Long COVID Genes
For those with their 23andMe genetic data to hand…
❝Study findings revealed that three specific genetic loci, HLA-DQA1–HLA-DQB1, ABO, and BPTF–KPAN2–C17orf58, and three phenotypes were at significantly heightened risk, highlighting high-priority populations for interventions against this poorly understood disease.❞
For those who don’t, then first: you might consider getting that! Here’s why:
Genetic Testing: Health Benefits & Methods
But also, all is not lost meanwhile:
The same study also found that individuals with genetic predispositions to chronic fatigue, depression, and fibromyalgia, as well as other phenotypes such as autoimmune conditions and cardiometabolic conditions, are at significantly higher risk of long-COVID than individuals without these conditions.
Good news, bad news
Another finding was that women and non-smokers were more likely to get Long COVID, than men and smokers, respectively.
Does that mean that those things are protective against Long COVID, which would be very counterintuitive in the case of smoking?
Well, yes and no; it depends on whether you count “less likely to get Long COVID because of being more likely to just die” as protective against Long COVID.
(Incidentally, estrogen is moderately immune-enhancing, while testosterone is moderately immune-suppressing, so the sex thing was not too surprising. It’s also at least contributory to why women get more autoimmune disorders, while men get more respiratory infections such as colds and the like)
Want to know more?
You can read the paper itself, here:
*GWAS = Genome-Wide Association Study
Take care!
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Gut Health and Anxiety
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝I’d like to read articles on gut health and anxiety❞
We hope you caught yesterday’s edition of 10almonds, which touched on both of those! Other past editions you might like include:
We’ll be sure to include more going forward, too!
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You can train your nose – and 4 other surprising facts about your sense of smell
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Would you give up your sense of smell to keep your hair? What about your phone?
A 2022 US study compared smell to other senses (sight and hearing) and personally prized commodities (including money, a pet or hair) to see what people valued more.
The researchers found smell was viewed as much less important than sight and hearing, and valued less than many commodities. For example, half the women surveyed said they’d choose to keep their hair over sense of smell.
Smell often goes under the radar as one of the least valued senses. But it is one of the first sensory systems vertebrates developed and is linked to your mental health, memory and more.
Here are five fascinating facts about your olfactory system.
DimaBerlin/Shutterstock 1. Smell is linked to memory and emotion
Why can the waft of fresh baking trigger joyful childhood memories? And why might a certain perfume jolt you back to a painful breakup?
Smell is directly linked to both your memory and emotions. This connection was first established by American psychologist Donald Laird in 1935 (although French novelist Marcel Proust had already made it famous in his reverie about the scent of madeleines baking.)
Odours are first captured by special olfactory nerve cells inside your nose. These cells extend upwards from the roof of your nose towards the smell-processing centre of your brain, called the olfactory bulb.
Smells are first detected by nerve cells in the nose. Axel_Kock/Shutterstock From the olfactory bulb they form direct connection with the brain’s limbic system. This includes the amygdala, where emotions are generated, and the hippocampus, where memories are created.
Other senses – such as sight and hearing – aren’t directly connected to the lymbic system.
One 2004 study used functional magnetic resonance imaging to demonstrate odours trigger a much stronger emotional and memory response in the brain than a visual cue.
2. Your sense of smell constantly regenerates
You can lose your ability to smell due to injury or infection – for example during and after a COVID infection. This is known as olfactory dysfunction. In most cases it’s temporary, returning to normal within a few weeks.
This is because every few months your olfactory nerve cells die and are replaced by new cells.
We’re not entirely sure how this occurs, but it likely involves your nose’s stem cells, the olfactory bulb and other cells in the olfactory nerves.
Other areas of your nervous system – including your brain and spinal cord – cannot regenerate and repair after an injury.
Constant regeneration may be a protective mechanism, as the olfactory nerves are vulnerable to damage caused by the external environment, including toxins (such as cigarette smoke), chemicals and pathogens (such as the flu virus).
But following a COVID infection some people might continue to experience a loss of smell. Studies suggest the virus and a long-term immune response damages the cells that allow the olfactory system to regenerate.
3. Smell is linked to mental health
Around 5% of the global population suffer from anosmia – total loss of smell. An estimated 15-20% suffer partial loss, known as hyposmia.
Given smell loss is often a primary and long-term symptom of COVID, these numbers are likely to be higher since the pandemic.
Yet in Australia, the prevalence of olfactory dysfunction remains surprisingly understudied.
Losing your sense of smell is shown to impact your personal and social relationships. For example, it can mean you miss out on shared eating experiences, or cause changes in sexual desire and behaviour.
In older people, declining ability to smell is associated with a higher risk of depression and even death, although we still don’t know why.
Losing your sense of smell can have a major impact on mental health. Halfpoint/Shutterstock 4. Loss of smell can help identify neurodegenerative diseases
Partial or full loss of smell is often an early indicator for a range of neurodegenerative diseases, including Alzheimer’s and Parkinson’s diseases.
Patients frequently report losing their sense of smell years before any symptoms show in body or brain function. However many people are not aware they are losing their sense of smell.
There are ways you can determine if you have smell loss and to what extent. You may be able to visit a formal smell testing centre or do a self-test at home, which assesses your ability to identify household items like coffee, wine or soap.
5. You can train your nose back into smelling
“Smell training” is emerging as a promising experimental treatment option for olfactory dysfunction. For people experiencing smell loss after COVID, it’s been show to improve the ability to detect and differentiate odours.
Smell training (or “olfactory training”) was first tested in 2009 in a German psychology study. It involves sniffing robust odours — such as floral, citrus, aromatic or fruity scents — at least twice a day for 10—20 seconds at a time, usually over a 3—6 month period.
Participants are asked to focus on the memory of the smell while sniffing and recall information about the odour and its intensity. This is believed to help reorganise the nerve connections in the brain, although the exact mechanism behind it is unclear.
Some studies recommend using a single set of scents, while others recommend switching to a new set of odours after a certain amount of time. However both methods show significant improvement in smelling.
This training has also been shown to alleviate depressive symptoms and improve cognitive decline both in older adults and those suffering from dementia.
Just like physiotherapy after a physical injury, olfactory training is thought to act like rehabilitation for your sense of smell. It retrains the nerves in your nose and the connections it forms within the brain, allowing you to correctly detect, process and interpret odours.
Lynn Nazareth, Research Scientist in Olfactory Biology, CSIRO
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Health Care AI, Intended To Save Money, Turns Out To Require a Lot of Expensive Humans
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Preparing cancer patients for difficult decisions is an oncologist’s job. They don’t always remember to do it, however. At the University of Pennsylvania Health System, doctors are nudged to talk about a patient’s treatment and end-of-life preferences by an artificially intelligent algorithm that predicts the chances of death.
But it’s far from being a set-it-and-forget-it tool. A routine tech checkup revealed the algorithm decayed during the covid-19 pandemic, getting 7 percentage points worse at predicting who would die, according to a 2022 study.
There were likely real-life impacts. Ravi Parikh, an Emory University oncologist who was the study’s lead author, told KFF Health News the tool failed hundreds of times to prompt doctors to initiate that important discussion — possibly heading off unnecessary chemotherapy — with patients who needed it.
He believes several algorithms designed to enhance medical care weakened during the pandemic, not just the one at Penn Medicine. “Many institutions are not routinely monitoring the performance” of their products, Parikh said.
Algorithm glitches are one facet of a dilemma that computer scientists and doctors have long acknowledged but that is starting to puzzle hospital executives and researchers: Artificial intelligence systems require consistent monitoring and staffing to put in place and to keep them working well.
In essence: You need people, and more machines, to make sure the new tools don’t mess up.
“Everybody thinks that AI will help us with our access and capacity and improve care and so on,” said Nigam Shah, chief data scientist at Stanford Health Care. “All of that is nice and good, but if it increases the cost of care by 20%, is that viable?”
Government officials worry hospitals lack the resources to put these technologies through their paces. “I have looked far and wide,” FDA Commissioner Robert Califf said at a recent agency panel on AI. “I do not believe there’s a single health system, in the United States, that’s capable of validating an AI algorithm that’s put into place in a clinical care system.”
AI is already widespread in health care. Algorithms are used to predict patients’ risk of death or deterioration, to suggest diagnoses or triage patients, to record and summarize visits to save doctors work, and to approve insurance claims.
If tech evangelists are right, the technology will become ubiquitous — and profitable. The investment firm Bessemer Venture Partners has identified some 20 health-focused AI startups on track to make $10 million in revenue each in a year. The FDA has approved nearly a thousand artificially intelligent products.
Evaluating whether these products work is challenging. Evaluating whether they continue to work — or have developed the software equivalent of a blown gasket or leaky engine — is even trickier.
Take a recent study at Yale Medicine evaluating six “early warning systems,” which alert clinicians when patients are likely to deteriorate rapidly. A supercomputer ran the data for several days, said Dana Edelson, a doctor at the University of Chicago and co-founder of a company that provided one algorithm for the study. The process was fruitful, showing huge differences in performance among the six products.
It’s not easy for hospitals and providers to select the best algorithms for their needs. The average doctor doesn’t have a supercomputer sitting around, and there is no Consumer Reports for AI.
“We have no standards,” said Jesse Ehrenfeld, immediate past president of the American Medical Association. “There is nothing I can point you to today that is a standard around how you evaluate, monitor, look at the performance of a model of an algorithm, AI-enabled or not, when it’s deployed.”
Perhaps the most common AI product in doctors’ offices is called ambient documentation, a tech-enabled assistant that listens to and summarizes patient visits. Last year, investors at Rock Health tracked $353 million flowing into these documentation companies. But, Ehrenfeld said, “There is no standard right now for comparing the output of these tools.”
And that’s a problem, when even small errors can be devastating. A team at Stanford University tried using large language models — the technology underlying popular AI tools like ChatGPT — to summarize patients’ medical history. They compared the results with what a physician would write.
“Even in the best case, the models had a 35% error rate,” said Stanford’s Shah. In medicine, “when you’re writing a summary and you forget one word, like ‘fever’ — I mean, that’s a problem, right?”
Sometimes the reasons algorithms fail are fairly logical. For example, changes to underlying data can erode their effectiveness, like when hospitals switch lab providers.
Sometimes, however, the pitfalls yawn open for no apparent reason.
Sandy Aronson, a tech executive at Mass General Brigham’s personalized medicine program in Boston, said that when his team tested one application meant to help genetic counselors locate relevant literature about DNA variants, the product suffered “nondeterminism” — that is, when asked the same question multiple times in a short period, it gave different results.
Aronson is excited about the potential for large language models to summarize knowledge for overburdened genetic counselors, but “the technology needs to improve.”
If metrics and standards are sparse and errors can crop up for strange reasons, what are institutions to do? Invest lots of resources. At Stanford, Shah said, it took eight to 10 months and 115 man-hours just to audit two models for fairness and reliability.
Experts interviewed by KFF Health News floated the idea of artificial intelligence monitoring artificial intelligence, with some (human) data whiz monitoring both. All acknowledged that would require organizations to spend even more money — a tough ask given the realities of hospital budgets and the limited supply of AI tech specialists.
“It’s great to have a vision where we’re melting icebergs in order to have a model monitoring their model,” Shah said. “But is that really what I wanted? How many more people are we going to need?”
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
This article first appeared on KFF Health News and is republished here under a Creative Commons license.
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The Dangers Of Fires, Floods, & Having Your Hair Washed
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It’s a dangerous business, going out of your door… And this week’s news round-up looks at 5 reasons why that might be:
Superspreading like wildfire
Environmental health risks are a big topic these days, with our changing climate. As for wildfires? Some of the risks are obvious: burning to death or choking to death in the smoke—but even upon surviving the seemingly worst, more threats remain that themselves can still kill.
Those threats include that both burns and smoke inhalation can cause acute and chronic changes in the immune system. Specifically: changes for the worse. The mechanisms by which this happens depend on the nature of any burns received, and in the case of smoke, what exactly was in the smoke. Now, there is no kind of smoke that is healthy to inhale, but definitely some kinds are a lot worse than others, and let’s just say, people’s homes contain a lot of plastic.
Additionally, if you think someone coughing near you spreads germs, imagine how far germs can be spread by miles-high, miles-wide billowing hot air.
In short, there’s a lot going on and none of it is good, and we’ve barely had room to summarise here, so…
Read in full: Wildfires ignite infection risks by weakening the body’s immune defenses and spreading bugs in smoke
Related: What’s Lurking In Your Household Air?
A flood of diseases
*record scratch*
Environmental health risks are a big topic these days, with our changing climate. As for floods? Some of the risks are obvious: drowning to death or having your house washed away—but even upon surviving the seemingly worst, more threats remain that themselves can still kill.
Those threats include increases in deaths from infectious and parasitic diseases, and respiratory diseases in general. Simply, a place that has been waterlogged, even if it seems “safe” now, is not a healthy place to be, due to bacteria, viruses, fungi, and more. In fact, it even increases all-cause mortality, because being healthy in such a place is simply harder:
Read in full: Linked to higher mortality rates, large floods emerge as an urgent public health concern
Related: Dodging Dengue In The US
Don’t lose your head
Visiting the hairdresser is not something that most people consider a potential brush with death—your hairdresser is probably not Sweeney Todd, after all. However…
There is an issue specifically with getting your hair washed there. Backwash basins—the sink things into which one rests one’s head at a backwards tilt—create an awkward angle for the cervical vertebrae and a sudden reduction in blood flow to the brain can cause a stroke, with the risk being sufficiently notable as to have its own name in scientific literature: beauty parlor stroke syndrome (BPSS).
❝While research suggests BPSS is most likely to occur in women over 50—and previous history of narrowing or thinning of blood vessels and arthritis of the spinal column in the neck are particular risk factors—it could happen to anyone regardless of age or medical history.❞
Read in full: The hidden health risk of having your hair washed
Related: Your Stroke Survival Plan
The smartwatch wristbands that give you cancer
It’s about the PFAS content. The article doesn’t discuss cancer in detail, just mentioning the increased risk, but you can read about the link between the two in our article below.
Basically, if your smartwatch wristband is a) not silicone and b) waterproof anyway, especially if it’s stain-resistant (as most are designed to be, what with wearing it next to one’s skin all the time while exercising, and not being the sort of thing one throws in the wash), then chances are it has PFAS levels much higher than normally found in consumer goods or clothing.
You can read more about how to identify the risks, here:
Read in full: Smartwatch bands can contain high levels of toxic PFAS, study finds
Related: PFAS Exposure & Cancer: The Numbers Are High
The cows giving milk with a little extra
Bird flu (HPAI) is now not the only flu epidemic amongst cattle in the US, and not only that, but rather than “merely” colonizing the lungs and upper respiratory tracts, in this case the virus (IAV) is thriving in the mammary glands, meaning that yes, it gets dispensed into the milk, and so far scientists are simply scrambling to find better ways to vaccinate the cattle, in the hopes that the milk will not be so risky because yes, it is currently a “reservoir and transmission vector” for the virus.
There are, however, barriers to creating those vaccines:
Read in full: Unexpected viral reservoir: influenza A thrives in cattle mammary glands
Related: Cows’ Milk, Bird Flu, & You
Take care!
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How an Idaho vaccine advocacy org plans its annual goals
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The start of a new year means many nonprofits and community health workers are busy setting goals and reflecting on what’s worked and what hasn’t. For those engaged in vaccine outreach, it also means reflecting on the tools and tactics that help them communicate better with their communities about why vaccines matter.
Across the country, childhood vaccination rates have declined since the COVID-19 pandemic, resulting in a resurgence of preventable diseases like pertussis.
Also known as whooping cough, pertussis has surged in states like Idaho, said Karen Jachimowski Sharpnack, executive director of the Idaho Immunization Coalition, in a conversation with PGN about the organization’s 2025 priorities.
Sharpnack shared how spikes in infectious respiratory illnesses can create opportunities to listen better and understand the nuances of the communities they serve.
Here’s more of what Sharpnack said.
[Editor’s note: The contents of this interview have been edited for length and clarity.]
PGN: Whooping cough cases are up in your state. Can you share an example of how your organization is responding?
Karen Jachimowski Sharpnack: If you look at Treasure Valley and Northern Idaho, the majority of those cases have been reported, and it’s like five times as much as we had the previous year.
So, two things that the Coalition is doing in response: First, we put out radio public service announcements throughout those particular areas about what whooping cough is, how contagious it is, and what you should do if you think your child or anyone you know has it.
Second, we are contacting every school superintendent, principal, school nurse, with a letter from us at the Coalition [to warn about] the whooping cough outbreaks in schools right now. Here’s what the symptoms are, here’s what you can do, and then here’s how you can protect yourself and your families.
It doesn’t mean the health district wouldn’t do it, or the Department of Health and Welfare can’t do it. But from our standpoint, at least we are bringing an awareness to the schools that this is happening.
PGN: How does your organization decide when outreach is needed? How do you take a pulse of your communities’ vaccine attitudes?
K.J.S.: We consistently hold listening sessions. We do them in English and Spanish if we need to, and we go around—and I’m talking about the southern part of the state—and bring people together.
We’ve done adults, we’ve done teenagers, we’ve done college students, we’ve done seniors, we’ve done all age groups.
So, we’ll bring eight or 10 people together, and we’ll spend a couple of hours with them. We feed them and we also pay them to be there. We say, ‘We want to hear from you about what you’re hearing about vaccines, what your views are if you’re vaccinated.’ Anytime, by the way, they can get up and leave and still get paid.
We want to hear what they’re hearing on the ground. And these sessions are extremely informational. For one, we learn about the misinformation that goes out there, like immediately. And two, we’re able to then focus [on how to respond]. If we’re hearing this, what kind of media campaign do we need to get together?
PGN: How do these listening sessions inform your work?
K.J.S.: So, a couple times a year we also pay a professional poller to do a poll. And when we get those results we check them against our listening sessions. We want to see: Are we on target? Are we ahead?
We just finished putting a one-pager together for legislators, so we’re ready to go with the new [legislative] session. We do this poll every year in August-September to know how Idahoans are feeling about vaccines. We get the results in October, because we’re getting ready for the next year.
We actually poll 19-to-64-year-olds, really honing in on questions like, ‘Do you believe vaccines are safe and effective?’ ‘Do you believe that school vaccination rules should still be in place?’
And what’s pretty cool is that two-thirds of Idahoans still believe vaccines are safe and effective, want to keep school rules in place, and believe that the infrastructure systems that we have in place for our vaccine registry should remain the same. Those are important to hear, so this is really good information that we can pull out and do something with.
PGN: Like what?
K.J.S.: Here’s the bottom line. It takes money to do this work, so you have to be able to say what you are going to do with the results.
Doing a poll costs anywhere from $15,000 to $35,000. This is an expensive investment, but we know that the polling is so important to us, along with the time that I have my staff go out and do the listening sessions and get feedback.
We take those results to educate, to talk to our legislators, and advocate for vaccines. We actually do these high-level media campaigns around the state. So, we are actually doing something with the polling. We’re not just sharing the results out.
And then we actually ask, what can we do to make a change? What are we hearing that we need to focus on?
That’s why it’s really important, because we are actually pushing this out for 2025. We know where we’re going in 2025 programmatically with marketing, and we know where we’re going with advocacy work.
We’re not guessing. We’re actually listening to people. And then we’re making really concrete decisions on how we’re going to move the organization forward to be able to help our communities.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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